圆 =自动/显示所有参数=否,显示触测=是 理论值/53.975,0,0,0,0,1,10.2 实际值/53.962,0.001,0,0,0,1,10.2 目标值/53.975,0,0,0,0,1 测定/圆 触测/基本,59.075,0,-3,1,180,0,59.06,0,-3 54.215,5.398,-3,1,-90,0,54.216,5.399,-3 48.875,0,-3,1,0,0,48.863,0,-3 54.215,-5.398,-3,1,90,0,54.215,-5.396,-3 我输入的圆心坐标是:极半径是53.975,极角是0,深度是-3.请问触测值的后三位表示的是什么?